Tool and jig for cable work



O Ct. 27, 1931. C. A, BAY 1,829,033

y T001l AND JIG FOR CABLE wom;

Filed Jan. 21, 1929 FIG.

INVENTOR Uff/@m55 HNOPEW BHV 9 j! ATTORNEYS Patented Oct. 27, 1931 UNITED STATES PATENT OFFICE CBZBJLESy BAY, OF MORBISTOWN, NEW JERSEY, ASSIGNOIR, TO JAMES R1 KEARNEY CORPORATION, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI TOOL AND JIG FOR CABLE WORKr Application led January 21, 1929. Serial No. 333,877.

This invention relates to improvementsin jigs, `tools andthe like, and particularly to an improved instrument adapted to be used in the preparation of lead sheath cable ends for service connections. f

An obj ect ofthe present invention is to provide an improved tool, which, in use, enables an accurate advance determination of the necessary sheath or insulation removal, preparatory to insertion of the cable end in a clamping or connecting device.

A further-object is to yprovide an improvedy jig, embodying means for accurately determining and fixing the position of a cable holdwing memberalong a conductor, preparatory. to secu-rement of lthe holding member tothe conductor. l

A still furtherfobject is to provide a jig for usein.r preparing cable-ends, the jigbeing so ZV'dimensioned, that when employed with av cable end, itl will provide positive assurance that the prepared l ortion of the cable will bey perfectly adapte for the apparatus with which it is to be connected or used. y

Additional objects `will appear from the drawings and the following etailed description.

It will, of course, be Vunderstood that the present description andthe accompanying lo"V drawingsrelate toa single, preferred executiona-l embodiment of the present invention, and that substantial changes in the described construction, arrangement and adaptability of the detailed parts, may be made without "departinggfrom `the spirit and scope of the invention.` v j. j The preferred form of jig hereinafter described, is particularly adapted for the prep.- aration of'cable ends to be inserted into a conhecting device such as is described in my copending application, filed January 16, 1929, and bearing Serial No. 332,942. n

kReferring to the drawings, Fig. 1 is a side -elevation, partially in section, of a preferred Florin of jig, made according tothe present invention Fig. 2 is a sectional `elevation of a conductorl end, previously prepared by the jig shown in Fig; 1, and secured in place, iny a connecting device. f

sa" Referringby numerals to the drawings, the

tool 10 may be constructed in any suitable manner, depending upon the characteristics of the conductor to be prepared thereby, and upon the nature of its service connection. By way of illustration, the jig is shown as comprising a body portion which issubstantially cylindrical in shape, and hollow substantially over its length, and vhaving one end 1l threaded to form attachment means fora sleeve or nut 12. Theopposite end of the hollow body portion is 'partially closed to form an internal abutment 13. A projecting lug 1st is externallydisposed on one end of the body, preferably in radial alignment with the abutment `13. The lug 14 is disposed in definitely spaced relation to a knife-edge member 15, which isithread'edly, or otherwise removably attachedvto the body portionof the jig 10. The member 15 constitutes a` scriber, ormarking element, and may be proportioned to serve as a cutting element for the cable sheath. A shoulder 16 is provided on the lug 14, to form a seat or stop for the cable placed thereon. The distance between the shoulderl andthe knife edge, is preferably determined by, and substantially equal to, the length of a clamping groove 17, ora like attaching seat, in which the stripped cable end is ultimately to be located, when in service.k Therefore, by placing the end of acable substantially parallel.' to the jig body, against the shoulder 16 of the lug 14, and upon rotating the jig with the cable in contact with the knife edge 15, the necessary length ofvbare cable Will be marked thereon; if this operation be continued, and the member lfbe employed as a cutting element, the cutting edge thereof will serve to sever the insulation to the required depth, to enable-its easy removal,

and thus to leavethe required length. of bare cable end.v Atthe sameoperation',.the length of removal of lead sheath 18.down to the insulatingmaterial 19, may be determined byk marking the cable at a point corresponding point Where the bare end of the cable abuts the shoulder 13. The shoulder 21, formed on the cable Ly the removal of the insulation, at the same time impinges upon a shoulder 22 "formed in the jig, these relations being observed through a sight hole formed in the body, before clampingl the conductor in place by a set Wrench 24C. lt Will be readily seen that the rela-tion of' parts of the jig and cable, as ust described, are all predetermined by the relative positions of the parts 14 and cn the outside oit the jiO body. A holding member 25, associated With the nut 12, may then be positioned along the conductor, by

' securement ci the nut tothe threaded end l1 of the jig, and in this position the cable may be wiped or soldered, as shoivn at 2, into engagement with the end of the sleeve.

ily Way of illustration,1 the nut 12 and the 1holding member 25 have been described as cooperating with the jig 10, as parts thereof.

will, however, be seen that these parts conu-e ineens for attaching a cable to an insulated cable-clamping or connecting device, such as is illustrated in Fig. 2; and that the length of the body portion ofthe jig, is, in the present example, equal to, and determined by the length of the cable to be inserted in the connecting device (of Fig. 2) as a Whole, exc-usiye of the parts 12 and 25.

tbriously, any ot the many equivalents of the holding member 25 and nut 12 may be employed and, instead of using the described threaded connection on member 12, this element may be frictionally retained, keyed or pinned to the body While effecting the soldering or wiping operations.

By Way of illustration of a single application of the described jig, it may be indicated that the clamping groove 17 (of Fig. 2) is formed in a suitable cable clamp 27 for interconnecting a plurality of cable ends; and that the conductor is housed in a metal container, a Wall portion thereof being indicated at 28, and the conductor insulated from the Wall portion by an insulating body 29. in entrance nipple 30 and an insulating bushing 31 aid, respectively, in positioning and insulating the cable entering the container 2S.

Particularly in a cable-clamping and connecting device of the sort referred to above, and described in the copending application 1here o'ore noted, it is desirable that a cable end be stripped to no greater length than necessary, and that a holding member such as 25, be accurately located along the cable. lt will be seen that the described jig or tool precludes inaccuracies in locating such a holding member, results in uniform stripping, and elle` ts a substantial saving of time in the complete process of preparing cable ends.

l claim as my invention:

l. In tool tor preparing an insulated conductor for securement to a holding member having a threaded portion, an element for receiving an end portion of the conductor, a threaded portion on said element adapted to position the holding member with respect thereto, and combined gauge and stripping mor-.ns carried by said element.

2. A. combined gauge and holding tool for receiving and preparing a metal-sheath cable for electrical connection and connection with a cable sleeve including a sleeve holding portion, a stripping gauge, and means for removably securing the tool to the cable.

3. In a. tool for preparing an insulated conductor tor electrical connection and securement to a threaded cable sleeve, a body portion of tubular form adapted to receive an end portion of the conductor, gauge means carried exteriorly of the body, and adapted for fixing the location of the sleeve along the conductor, and threaded means formed on the body portion, for detachable engagement with the cable sleeve.

4. A tool for preparing an insulated conductor for electrical connection.l and lor securement to a holding member distinct from said connection, said tool including a gauge determining the extent of insulation to be removed, a body having a longitudinal channel for receiving the conductor, means carried by the body, for positioning and holding the tool with respect to the conductor, and means on the body for detachably engaging the holding member to fix its position along the conductor.

5. ln a tool for preparing insulated cable for electrical connection with a device employing an exterior cable support, and for holding the cable during securement to said support, a. body having a longitudinal cable channel, means on the body for gauging the distance between said support and a stripped cable portion, combined means carried by the body, for gauglng the length of cable to be stripped, and severing the insulation therefrom, and a. portion on said body for detachably engaging the cable support.

in a tool for preparing metal sheath cable for connection with enclosed electrical apparatus employing an exterior cablesleeve, a tubular body portion, means forming a stripping-gauge on said body, stops carried internally of said body, for determining the length of insulated cable to extend Within the enclosure for associated apparatus, and a sleeve-holding portion, carried exteriorly of the body.

7. In a tool for preparing metal-sheath cable for connection into a junction box, or the like, employing an exterior, threaded, cable-holding sleeve, a tubular body constituting a receiver for the cable end; means forming, on the body, a gauge determining x f lois,v

of such sleeve, saloni3 the conductor.

CHARL S ANDREW BAY. 

